Volture

Feedback. Creatures that hit the Volture with a melee attack take 2d6 lightning damage

Lightning Absorption. Whenever the Volture is subjected to lightning damage, it takes no damage and instead regains a number of hit points equal to the lightning damage dealt

Attraction. If a spell or effect that does lightning damage passes within 10ft of a Volture, that damage is instead dealt to the Volture closest to it

Discharge (Recharge 4-6). The Volture releases an electrical charge in a 10ft radius around it, dealing 4d10 lightning damage to anyone who fails a DC 13 Dexterity saving throw

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 9 (2d8 + 1) slashing damage plus 6 (2d6) lightning damage